GREENPATCH-421 is a 53% alumina air-setting refractory mortar used as a patch for general use, as a coating or as a bonding material for brick.
It is premixed, and provides a good chemical match to many common brick, castable and plastic linings. It is typically used for general patching applications, but it can also be thinned for brush coating. Maximum service temperature is 3200 degrees F. Patch thickness should be limited to 3". Can be used in boilers, brick plants, steel mills, asphalt plants, and in iron foundries. It be fired-in faster than regular high alumina mortars. Can be field adjusted with water as needed. You'll need 6.25 lbs. of product per sq. ft. assuming 1/2" thickness. Manufactured by HarbisonWalker International. Available in a 15 lb and 55 lb pails.
Safety data sheets are available on request. Always follow manufacturer's instructions. Wear goggles, gloves and a mask.
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